2316779277409 has 3 divisors (see below), whose sum is σ = 2316780799507. Its totient is φ = 2316777755312.

The previous prime is 2316779277403. The next prime is 2316779277503. The reversal of 2316779277409 is 9047729776132.

The square root of 2316779277409 is 1522097.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1323822830625 + 992956446784 = 1150575^2 + 996472^2 .

It is not a de Polignac number, because 2316779277409 - 2³³ = 2308189342817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2316779277403) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 761049 + ... + 2283145.

Almost surely, 2^{2316779277409} is an apocalyptic number.

2316779277409 is the 1522097-th square number.

2316779277409 is the 761049-th centered octagonal number.

It is an amenable number.

2316779277409 is a deficient number, since it is larger than the sum of its proper divisors (1522098).

2316779277409 is an frugal number, since it uses more digits than its factorization.

2316779277409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044194 (or 1522097 counting only the distinct ones).

The product of its (nonzero) digits is 56010528, while the sum is 64.

Multiplying 2316779277409 by its sum of digits (64), we get a square (148273873754176 = 12176776²).

The spelling of 2316779277409 in words is "two trillion, three hundred sixteen billion, seven hundred seventy-nine million, two hundred seventy-seven thousand, four hundred nine".